#first{
    width: 600px;
    height:400px;
}
#secord{
    width: 600px;
    height:400px;
}
#third{
    width: 600px;
    height:400px;
}
#fourth{
    width: 700px;
    height:400px;
}
#fifth{
    width: 600px;
    height:400px;
}
#sixth{
    width: 600px;
    height:400px;
}
#serverth{
    width: 600px;
    height:400px;
}